Abstract: A connecting arrangement for rotor blades of a turbomachine includes projections (2), which extend in circumferential direction (3), are rigidly connected in pairs to a rotor blade and are respectively supported on the adjacent projection (2) by means of a pressure body (7). Each pressure body (7) has, on a securing face (8), a securing contour (10) which protrudes into an acceptance feature (11) of the associated projection (2) and is supported in it. Each pressure body (7) has, on a support face (9), a plane support surface (13) which has area support on a plane mating support surface (14) of the adjacent projection (2). In order to also improve the support in the case of different rotational angles of the projections (2), the securing contour (10) of the pressure body (7) is configured as a spherical segment. The associated acceptance feature (11) is likewise configured as a spherical segment whose radius (R) is of the same magnitude as the radius (R) of the spherical segment of the securing contour (10).

Abstract: A connecting arrangement for rotor blades of a turbomachine includes projections (2), which extend in circumferential direction (3), are rigidly connected in pairs to a rotor blade and are respectively supported on the adjacent projection (2) by means of a pressure body (7). Each pressure body (7) has, on a securing face (8), a securing contour (10) which protrudes into an acceptance feature (11) of the associated projection (2) and is supported in it. Each pressure body (7) has, on a support face (9), a plane support surface (13) which has area support on a plane mating support surface (14) of the adjacent projection (2). In order to also improve the support in the case of different rotational angles of the projections (2), the securing contour (10) of the pressure body (7) is configured as a spherical segment. The associated acceptance feature (11) is likewise configured as a spherical segment whose radius (R) is of the same magnitude as the radius (R) of the spherical segment of the securing contour (10).

Abstract: The invention relates to an apparatus for floor cleaning, with several wheels 4, 5, 6 being attached to a frame R in such a way that a curve movement about a momentary center MP, MP1, MP2 can be performed and all momentary centers MP, MP1, MP2 form a momentary center axis MA extending substantially transversally to the frame R, and with a cleaning device 24a, 24b being received in the frame R, which cleaning device forms a cleaning surface area RF which is delimited by a circumferential edge. In order to reduce uncleaned residual surfaces when moving along contours it is provided in accordance with the invention that the momentary center axis MA forms at least one point of intersection S1, S2 in a section of the circumferential edge disposed in the zone of the longitudinal side of the frame R.

Abstract: The invention relates to an apparatus for floor cleaning, with several wheels 4, 5, 6 being attached to a frame R in such a way that a curve movement about a momentary center MP, MP1, MP2 can be performed and all momentary centers MP, MP1, MP2 form a momentary center axis MA extending substantially transversally to the frame R, and with a cleaning device 24a, 24b being received in the frame R, which cleaning device forms a cleaning surface area RF which is delimited by a circumferential edge. In order to reduce uncleaned residual surfaces when moving along contours it is provided in accordance with the invention that the momentary center axis MA forms at least one point of intersection S1, S2 in a section of the circumferential edge disposed in the zone of the longitudinal side of the frame R.

Abstract: A live steam passage of double-shell design for steam turbines is disclosed. According to the present invention, the steam passage is welded as a welded-in insert (1) onto the outer housing (9) of the turbine. The piston ring supoprt sleeve (2) with the piston rings (4) slides as a separate part in a sleeve (5), which the sleeve (2) is screwed onto the welded-in insert (1) with locking screws (3). A threaded ring (6) provided with a high collar holds the sleeve (5) in place in the inner housing (7) of the turbine. The live steam passage according to the present invention can be used in steam turbines, including throttle-controlled steam turbines with inner housings.

Abstract: The invention relates to a method and a device for removing an elongate shrink-fitted core made of a tough material from a hole. According to the invention, a coupling member (5) or a pressure pin (3) is inserted into a bore (2) in the core (1) and projects therefrom. By applying a force to this member or pin, the core is elongated up to its plastic deformation range and is made to shrink radially. When the deformation has begun, the core is further loaded at low speed up to a maximum stress of between 95% and 97% of its rupture strength.